src/gallium/drivers/r300/r300_screen.c

   1 /*
   2  * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
   3  * Copyright 2010 Marek Olšák <maraeo@gmail.com>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  22  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  23
  24 #include "util/u_format.h"
  25 #include "util/u_format_s3tc.h"
  26 #include "util/u_memory.h"
  27 #include "os/os_time.h"
  28 #include "vl/vl_decoder.h"
  29 #include "vl/vl_video_buffer.h"
  30
  31 #include "r300_context.h"
  32 #include "r300_texture.h"
  33 #include "r300_screen_buffer.h"
  34 #include "r300_state_inlines.h"
  35 #include "r300_public.h"
  36
  37 #include "draw/draw_context.h"
  38
  39 /* Return the identifier behind whom the brave coders responsible for this
  40  * amalgamation of code, sweat, and duct tape, routinely obscure their names.
  41  *
  42  * ...I should have just put "Corbin Simpson", but I'm not that cool.
  43  *
  44  * (Or egotistical. Yet.) */
  45 static const char* r300_get_vendor(struct pipe_screen* pscreen)
  46 {
  47     return "X.Org R300 Project";
  48 }
  49
  50 static const char* chip_families[] = {
  51     "ATI R300",
  52     "ATI R350",
  53     "ATI RV350",
  54     "ATI RV370",
  55     "ATI RV380",
  56     "ATI RS400",
  57     "ATI RC410",
  58     "ATI RS480",
  59     "ATI R420",
  60     "ATI R423",
  61     "ATI R430",
  62     "ATI R480",
  63     "ATI R481",
  64     "ATI RV410",
  65     "ATI RS600",
  66     "ATI RS690",
  67     "ATI RS740",
  68     "ATI RV515",
  69     "ATI R520",
  70     "ATI RV530",
  71     "ATI R580",
  72     "ATI RV560",
  73     "ATI RV570"
  74 };
  75
  76 static const char* r300_get_name(struct pipe_screen* pscreen)
  77 {
  78     struct r300_screen* r300screen = r300_screen(pscreen);
  79
  80     return chip_families[r300screen->caps.family];
  81 }
  82
  83 static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
  84 {
  85     struct r300_screen* r300screen = r300_screen(pscreen);
  86     boolean is_r500 = r300screen->caps.is_r500;
  87
  88     switch (param) {
  89         /* Supported features (boolean caps). */
  90         case PIPE_CAP_NPOT_TEXTURES:
  91         case PIPE_CAP_TWO_SIDED_STENCIL:
  92         case PIPE_CAP_GLSL:
  93             /* I'll be frank. This is a lie.
  94              *
  95              * We don't truly support GLSL on any of this driver's chipsets.
  96              * To be fair, no chipset supports the full GLSL specification
  97              * to the best of our knowledge, but some of the less esoteric
  98              * features are still missing here.
  99              *
 100              * Rather than cripple ourselves intentionally, I'm going to set
 101              * this flag, and as Gallium's interface continues to change, I
 102              * hope that this single monolithic GLSL enable can slowly get
 103              * split down into many different pieces and the state tracker
 104              * will handle fallbacks transparently, like it should.
 105              *
 106              * ~ C.
 107              */
 108         case PIPE_CAP_ANISOTROPIC_FILTER:
 109         case PIPE_CAP_POINT_SPRITE:
 110         case PIPE_CAP_OCCLUSION_QUERY:
 111         case PIPE_CAP_TEXTURE_SHADOW_MAP:
 112         case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
 113         case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
 114         case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 115         case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 116         case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 117         case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 118             return 1;
 119
 120         /* r300 cannot do swizzling of compressed textures. Supported otherwise. */
 121         case PIPE_CAP_TEXTURE_SWIZZLE:
 122             return util_format_s3tc_enabled ? r300screen->caps.dxtc_swizzle : 1;
 123
 124         /* Supported on r500 only. */
 125         case PIPE_CAP_FRAGMENT_COLOR_CLAMP_CONTROL:
 126         case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 127         case PIPE_CAP_SM3:
 128             return is_r500 ? 1 : 0;
 129
 130         /* Unsupported features. */
 131         case PIPE_CAP_TIMER_QUERY:
 132         case PIPE_CAP_DUAL_SOURCE_BLEND:
 133         case PIPE_CAP_INDEP_BLEND_ENABLE:
 134         case PIPE_CAP_INDEP_BLEND_FUNC:
 135         case PIPE_CAP_DEPTH_CLAMP:
 136         case PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE:
 137         case PIPE_CAP_SHADER_STENCIL_EXPORT:
 138         case PIPE_CAP_ARRAY_TEXTURES:
 139         case PIPE_CAP_TGSI_INSTANCEID:
 140         case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 141         case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 142         case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
 143         case PIPE_CAP_SEAMLESS_CUBE_MAP:
 144         case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 145         case PIPE_CAP_SCALED_RESOLVE:
 146             return 0;
 147
 148         /* SWTCL-only features. */
 149         case PIPE_CAP_STREAM_OUTPUT:
 150         case PIPE_CAP_PRIMITIVE_RESTART:
 151             return !r300screen->caps.has_tcl;
 152
 153         /* Texturing. */
 154         case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
 155         case PIPE_CAP_MAX_COMBINED_SAMPLERS:
 156             return r300screen->caps.num_tex_units;
 157         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 158         case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 159         case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 160             /* 13 == 4096, 12 == 2048 */
 161             return is_r500 ? 13 : 12;
 162
 163         /* Render targets. */
 164         case PIPE_CAP_MAX_RENDER_TARGETS:
 165             return 4;
 166
 167         default:
 168             debug_printf("r300: Warning: Unknown CAP %d in get_param.\n",
 169                          param);
 170             return 0;
 171     }
 172 }
 173
 174 static int r300_get_shader_param(struct pipe_screen *pscreen, unsigned shader, enum pipe_shader_cap param)
 175 {
 176    struct r300_screen* r300screen = r300_screen(pscreen);
 177    boolean is_r400 = r300screen->caps.is_r400;
 178    boolean is_r500 = r300screen->caps.is_r500;
 179
 180    switch (shader)
 181     {
 182     case PIPE_SHADER_FRAGMENT:
 183         switch (param)
 184         {
 185         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 186             return is_r500 || is_r400 ? 512 : 96;
 187         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 188             return is_r500 || is_r400 ? 512 : 64;
 189         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 190             return is_r500 || is_r400 ? 512 : 32;
 191         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 192             return is_r500 ? 511 : 4;
 193         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 194             return is_r500 ? 64 : 0; /* Actually unlimited on r500. */
 195             /* Fragment shader limits. */
 196         case PIPE_SHADER_CAP_MAX_INPUTS:
 197             /* 2 colors + 8 texcoords are always supported
 198              * (minus fog and wpos).
 199              *
 200              * R500 has the ability to turn 3rd and 4th color into
 201              * additional texcoords but there is no two-sided color
 202              * selection then. However the facing bit can be used instead. */
 203             return 10;
 204         case PIPE_SHADER_CAP_MAX_CONSTS:
 205             return is_r500 ? 256 : 32;
 206         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 207             return 1;
 208         case PIPE_SHADER_CAP_MAX_TEMPS:
 209             return is_r500 ? 128 : is_r400 ? 64 : 32;
 210         case PIPE_SHADER_CAP_MAX_ADDRS:
 211             return 0;
 212         case PIPE_SHADER_CAP_MAX_PREDS:
 213             return is_r500 ? 1 : 0;
 214         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 215         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 216         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 217         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 218         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 219         case PIPE_SHADER_CAP_SUBROUTINES:
 220         case PIPE_SHADER_CAP_INTEGERS:
 221             return 0;
 222         }
 223         break;
 224     case PIPE_SHADER_VERTEX:
 225         if (!r300screen->caps.has_tcl) {
 226             return draw_get_shader_param(shader, param);
 227         }
 228
 229         switch (param)
 230         {
 231         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 232         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 233             return is_r500 ? 1024 : 256;
 234         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 235         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 236             return 0;
 237         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 238             return is_r500 ? 4 : 0; /* For loops; not sure about conditionals. */
 239         case PIPE_SHADER_CAP_MAX_INPUTS:
 240             return 16;
 241         case PIPE_SHADER_CAP_MAX_CONSTS:
 242             return 256;
 243         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 244             return 1;
 245         case PIPE_SHADER_CAP_MAX_TEMPS:
 246             return 32;
 247         case PIPE_SHADER_CAP_MAX_ADDRS:
 248             return 1; /* XXX guessed */
 249         case PIPE_SHADER_CAP_MAX_PREDS:
 250             return is_r500 ? 4 : 0; /* XXX guessed. */
 251         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 252             return 1;
 253         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 254         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 255         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 256         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 257         case PIPE_SHADER_CAP_SUBROUTINES:
 258         case PIPE_SHADER_CAP_INTEGERS:
 259             return 0;
 260         }
 261         break;
 262     default:
 263         break;
 264     }
 265     return 0;
 266 }
 267
 268 static float r300_get_paramf(struct pipe_screen* pscreen, enum pipe_cap param)
 269 {
 270     struct r300_screen* r300screen = r300_screen(pscreen);
 271
 272     switch (param) {
 273         case PIPE_CAP_MAX_LINE_WIDTH:
 274         case PIPE_CAP_MAX_LINE_WIDTH_AA:
 275         case PIPE_CAP_MAX_POINT_WIDTH:
 276         case PIPE_CAP_MAX_POINT_WIDTH_AA:
 277             /* The maximum dimensions of the colorbuffer are our practical
 278              * rendering limits. 2048 pixels should be enough for anybody. */
 279             if (r300screen->caps.is_r500) {
 280                 return 4096.0f;
 281             } else if (r300screen->caps.is_r400) {
 282                 return 4021.0f;
 283             } else {
 284                 return 2560.0f;
 285             }
 286         case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 287             return 16.0f;
 288         case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 289             return 16.0f;
 290         case PIPE_CAP_GUARD_BAND_LEFT:
 291         case PIPE_CAP_GUARD_BAND_TOP:
 292         case PIPE_CAP_GUARD_BAND_RIGHT:
 293         case PIPE_CAP_GUARD_BAND_BOTTOM:
 294             /* XXX I don't know what these should be but the least we can do is
 295              * silence the potential error message */
 296             return 0.0f;
 297         default:
 298             debug_printf("r300: Warning: Unknown CAP %d in get_paramf.\n",
 299                          param);
 300             return 0.0f;
 301     }
 302 }
 303
 304 static int r300_get_video_param(struct pipe_screen *screen,
 305                                 enum pipe_video_profile profile,
 306                                 enum pipe_video_cap param)
 307 {
 308    switch (param) {
 309       case PIPE_VIDEO_CAP_SUPPORTED:
 310          return vl_profile_supported(screen, profile);
 311       case PIPE_VIDEO_CAP_NPOT_TEXTURES:
 312          return 0;
 313       case PIPE_VIDEO_CAP_MAX_WIDTH:
 314       case PIPE_VIDEO_CAP_MAX_HEIGHT:
 315          return vl_video_buffer_max_size(screen);
 316       default:
 317          return 0;
 318    }
 319 }
 320
 321 static boolean r300_is_format_supported(struct pipe_screen* screen,
 322                                         enum pipe_format format,
 323                                         enum pipe_texture_target target,
 324                                         unsigned sample_count,
 325                                         unsigned usage)
 326 {
 327     uint32_t retval = 0;
 328     boolean drm_2_8_0 = r300_screen(screen)->info.drm_minor >= 8;
 329     boolean is_r500 = r300_screen(screen)->caps.is_r500;
 330     boolean is_r400 = r300_screen(screen)->caps.is_r400;
 331     boolean is_color2101010 = format == PIPE_FORMAT_R10G10B10A2_UNORM ||
 332                               format == PIPE_FORMAT_R10G10B10X2_SNORM ||
 333                               format == PIPE_FORMAT_B10G10R10A2_UNORM ||
 334                               format == PIPE_FORMAT_R10SG10SB10SA2U_NORM;
 335     boolean is_ati1n = format == PIPE_FORMAT_RGTC1_UNORM ||
 336                        format == PIPE_FORMAT_RGTC1_SNORM ||
 337                        format == PIPE_FORMAT_LATC1_UNORM ||
 338                        format == PIPE_FORMAT_LATC1_SNORM;
 339     boolean is_ati2n = format == PIPE_FORMAT_RGTC2_UNORM ||
 340                        format == PIPE_FORMAT_RGTC2_SNORM ||
 341                        format == PIPE_FORMAT_LATC2_UNORM ||
 342                        format == PIPE_FORMAT_LATC2_SNORM;
 343     boolean is_x16f_xy16f = format == PIPE_FORMAT_R16_FLOAT ||
 344                             format == PIPE_FORMAT_R16G16_FLOAT ||
 345                             format == PIPE_FORMAT_A16_FLOAT ||
 346                             format == PIPE_FORMAT_L16_FLOAT ||
 347                             format == PIPE_FORMAT_L16A16_FLOAT ||
 348                             format == PIPE_FORMAT_I16_FLOAT;
 349     boolean is_half_float = format == PIPE_FORMAT_R16_FLOAT ||
 350                             format == PIPE_FORMAT_R16G16_FLOAT ||
 351                             format == PIPE_FORMAT_R16G16B16_FLOAT ||
 352                             format == PIPE_FORMAT_R16G16B16A16_FLOAT;
 353
 354     if (!util_format_is_supported(format, usage))
 355        return FALSE;
 356
 357     /* Check multisampling support. */
 358     switch (sample_count) {
 359         case 0:
 360         case 1:
 361             break;
 362         case 2:
 363         case 3:
 364         case 4:
 365         case 6:
 366             return FALSE;
 367 #if 0
 368             if (usage != PIPE_BIND_RENDER_TARGET ||
 369                 !util_format_is_rgba8_variant(
 370                     util_format_description(format))) {
 371                 return FALSE;
 372             }
 373 #endif
 374             break;
 375         default:
 376             return FALSE;
 377     }
 378
 379     /* Check sampler format support. */
 380     if ((usage & PIPE_BIND_SAMPLER_VIEW) &&
 381         /* ATI1N is r5xx-only. */
 382         (is_r500 || !is_ati1n) &&
 383         /* ATI2N is supported on r4xx-r5xx. */
 384         (is_r400 || is_r500 || !is_ati2n) &&
 385         /* R16F and RG16F texture support was added in as late as DRM 2.8.0 */
 386         (drm_2_8_0 || !is_x16f_xy16f) &&
 387         r300_is_sampler_format_supported(format)) {
 388         retval |= PIPE_BIND_SAMPLER_VIEW;
 389     }
 390
 391     /* Check colorbuffer format support. */
 392     if ((usage & (PIPE_BIND_RENDER_TARGET |
 393                   PIPE_BIND_DISPLAY_TARGET |
 394                   PIPE_BIND_SCANOUT |
 395                   PIPE_BIND_SHARED)) &&
 396         /* 2101010 cannot be rendered to on non-r5xx. */
 397         (!is_color2101010 || (is_r500 && drm_2_8_0)) &&
 398         r300_is_colorbuffer_format_supported(format)) {
 399         retval |= usage &
 400             (PIPE_BIND_RENDER_TARGET |
 401              PIPE_BIND_DISPLAY_TARGET |
 402              PIPE_BIND_SCANOUT |
 403              PIPE_BIND_SHARED);
 404     }
 405
 406     /* Check depth-stencil format support. */
 407     if (usage & PIPE_BIND_DEPTH_STENCIL &&
 408         r300_is_zs_format_supported(format)) {
 409         retval |= PIPE_BIND_DEPTH_STENCIL;
 410     }
 411
 412     /* Check vertex buffer format support. */
 413     if (usage & PIPE_BIND_VERTEX_BUFFER &&
 414         /* Half float is supported on >= RV350. */
 415         (is_r400 || is_r500 || !is_half_float) &&
 416         r300_translate_vertex_data_type(format) != R300_INVALID_FORMAT) {
 417         retval |= PIPE_BIND_VERTEX_BUFFER;
 418     }
 419
 420     /* Transfers are always supported. */
 421     if (usage & PIPE_BIND_TRANSFER_READ)
 422         retval |= PIPE_BIND_TRANSFER_READ;
 423     if (usage & PIPE_BIND_TRANSFER_WRITE)
 424         retval |= PIPE_BIND_TRANSFER_WRITE;
 425
 426     return retval == usage;
 427 }
 428
 429 static void r300_destroy_screen(struct pipe_screen* pscreen)
 430 {
 431     struct r300_screen* r300screen = r300_screen(pscreen);
 432     struct radeon_winsys *rws = radeon_winsys(pscreen);
 433
 434     util_slab_destroy(&r300screen->pool_buffers);
 435     pipe_mutex_destroy(r300screen->num_contexts_mutex);
 436
 437     if (rws)
 438       rws->destroy(rws);
 439
 440     FREE(r300screen);
 441 }
 442
 443 static void r300_fence_reference(struct pipe_screen *screen,
 444                                  struct pipe_fence_handle **ptr,
 445                                  struct pipe_fence_handle *fence)
 446 {
 447     pb_reference((struct pb_buffer**)ptr,
 448                              (struct pb_buffer*)fence);
 449 }
 450
 451 static boolean r300_fence_signalled(struct pipe_screen *screen,
 452                                     struct pipe_fence_handle *fence)
 453 {
 454     struct radeon_winsys *rws = r300_screen(screen)->rws;
 455     struct pb_buffer *rfence = (struct pb_buffer*)fence;
 456
 457     return !rws->buffer_is_busy(rfence, RADEON_USAGE_READWRITE);
 458 }
 459
 460 static boolean r300_fence_finish(struct pipe_screen *screen,
 461                                  struct pipe_fence_handle *fence,
 462                                  uint64_t timeout)
 463 {
 464     struct radeon_winsys *rws = r300_screen(screen)->rws;
 465     struct pb_buffer *rfence = (struct pb_buffer*)fence;
 466
 467     if (timeout != PIPE_TIMEOUT_INFINITE) {
 468         int64_t start_time = os_time_get();
 469
 470         /* Convert to microseconds. */
 471         timeout /= 1000;
 472
 473         /* Wait in a loop. */
 474         while (rws->buffer_is_busy(rfence, RADEON_USAGE_READWRITE)) {
 475             if (os_time_get() - start_time >= timeout) {
 476                 return FALSE;
 477             }
 478             os_time_sleep(10);
 479         }
 480         return TRUE;
 481     }
 482
 483     rws->buffer_wait(rfence, RADEON_USAGE_READWRITE);
 484     return TRUE;
 485 }
 486
 487 struct pipe_screen* r300_screen_create(struct radeon_winsys *rws)
 488 {
 489     struct r300_screen *r300screen = CALLOC_STRUCT(r300_screen);
 490
 491     if (!r300screen) {
 492         FREE(r300screen);
 493         return NULL;
 494     }
 495
 496     rws->query_info(rws, &r300screen->info);
 497
 498     r300_init_debug(r300screen);
 499     r300_parse_chipset(r300screen->info.pci_id, &r300screen->caps);
 500
 501     if (SCREEN_DBG_ON(r300screen, DBG_NO_ZMASK))
 502         r300screen->caps.zmask_ram = 0;
 503     if (SCREEN_DBG_ON(r300screen, DBG_NO_HIZ))
 504         r300screen->caps.hiz_ram = 0;
 505
 506     if (r300screen->info.drm_minor < 8)
 507         r300screen->caps.has_us_format = FALSE;
 508
 509     pipe_mutex_init(r300screen->num_contexts_mutex);
 510
 511     util_slab_create(&r300screen->pool_buffers,
 512                      sizeof(struct r300_resource), 64,
 513                      UTIL_SLAB_SINGLETHREADED);
 514
 515     r300screen->rws = rws;
 516     r300screen->screen.winsys = (struct pipe_winsys*)rws;
 517     r300screen->screen.destroy = r300_destroy_screen;
 518     r300screen->screen.get_name = r300_get_name;
 519     r300screen->screen.get_vendor = r300_get_vendor;
 520     r300screen->screen.get_param = r300_get_param;
 521     r300screen->screen.get_shader_param = r300_get_shader_param;
 522     r300screen->screen.get_paramf = r300_get_paramf;
 523     r300screen->screen.get_video_param = r300_get_video_param;
 524     r300screen->screen.is_format_supported = r300_is_format_supported;
 525     r300screen->screen.is_video_format_supported = vl_video_buffer_is_format_supported;
 526     r300screen->screen.context_create = r300_create_context;
 527     r300screen->screen.fence_reference = r300_fence_reference;
 528     r300screen->screen.fence_signalled = r300_fence_signalled;
 529     r300screen->screen.fence_finish = r300_fence_finish;
 530
 531     r300_init_screen_resource_functions(r300screen);
 532
 533     util_format_s3tc_init();
 534
 535     return &r300screen->screen;
 536 }